Keep holding the button until the standby indicator light starts blinking rapidly.
Because CVTE does not offer a direct public download portal for end-users, technicians rely on reputable community repositories. Search these forums for your specific panel file: cvte msd338 512m smart tv update download
The CVTE MSD338 (512M) is one of the most widely used universal smart TV mainboards in the budget television market. Manufactured by China Vanke Electron (CVTE) and powered by the Mstar MSD338 chipset, this board runs on an Android operating system. It features 512MB of RAM, which makes maintaining optimized firmware critical for smooth performance. Keep holding the button until the standby indicator